I think it’s pretty accepted by woodworkers that if you want clamps fast, and in quantity, without paying through the nose, the best option is going to Harbor Freight. Certainly, Harbor Freight gets a bad rap in some circles for being cheap, and is why your snootier woodworkers, who aren’t me, will clutch their pearls at the very notion of using anything from Harbor Freight.
But I’m not snooty and never subscribe to the notion that ‘cheap’ means ‘not good’. Hell, some of the best tacos I’ve ever had were basically dirt cheap.